On Monday, Earthlings will be treated to a so-called supermoon. That’s the closest full moon of the year, or every 14 months to be precise.

Monday’s supermoon was extra super — it was the closest the moon has come to us in almost 69 years. And it won’t happen again for another 18 years, in 2034.

NASA says closest approach occurred at 6:21 a.m. EST when the moon comes within 221,523 miles (356,508 kilometers). That’s from the center of the Earth to the center of the moon. Full moon will occur at 8:52 a.m. EST.

NASA planetary geologist Noah Petro is urging everyone to step outside and soak in the view. Prime viewing will be Sunday and Monday nights.